Device and method for graded recovery of aluminum from aluminum dross

Abstract

The application relates to the technical field of aluminum ash residue treatment, and discloses a device and a method for grading recovery of aluminum in aluminum ash residue, which comprises a box body, a feeding hopper connected to the top of the box body, a plurality of sieve plates slidably arranged in the box body, and sieve nets arranged on the sieve plates in an inclined manner, a positioning plate, and a driving wheel. The driving wheel is driven to rotate by a driving source, and the driving wheel drives the plurality of sieve plates to turn up and down through a transmission assembly, so that the aluminum ash residue on each sieve plate reciprocally rolls, the aluminum ash residue can be prevented from being accumulated in the included angle between the lower end of the sieve plate and the side wall of the box body, the aluminum ash residue on each layer of sieve plates can reciprocally roll, the repeated sieving of the aluminum ash residue on each layer of sieve nets is realized, the aluminum ash residue can be ensured to fully contact with the sieve nets, the formation of a slag heap is avoided, the aluminum ash residue smaller than the size of the sieve nets cannot pass through the sieve plates, and therefore the multistage recovery effect of aluminum in the aluminum ash residue is improved.

Description

Technical Field

[0001] This invention relates to the field of aluminum ash slag treatment technology, specifically to a graded recovery device and method for aluminum in aluminum ash slag. Background Technology

[0002] During the production of aluminum alloys, a large amount of aluminum ash is generated. In order to achieve effective recycling of resources, it is necessary to refine and recover the aluminum from the aluminum ash. The graded recovery of aluminum from aluminum ash refers to the graded treatment of aluminum ash using a grading and recovery device. This device usually includes a box, screen plates, drive unit, etc. There are multiple screen plates, vertically distributed, and the aperture size of the screen mesh on the screen plates decreases from top to bottom. The drive unit drives the screen plates to vibrate, so that aluminum particles of different diameters pass through the screens of different aperture sizes for grading.

[0003] Currently, there are some existing technologies that can achieve graded recovery of aluminum from aluminum ash slag. For example, patent publication number CN214160410U mainly uses a drive device to drive an inclined screen to shake and screen the aluminum ash slag. Under the action of multiple screen plates, aluminum particles of different diameters can be screened. After analysis, the drawback of this technical solution is that when the aluminum ash slag rolls along the inclined screen for screening, it is very easy to accumulate in the angle between the lower end of the screen and the side wall of the box under the action of inertia, forming a slag pile. The ash slag that can pass through the screen in the slag pile cannot fully contact the screen, resulting in low graded recovery efficiency of aluminum ash slag. Based on this, the present invention provides a graded recovery device and method for aluminum ash slag that ensures that the aluminum ash slag on each layer of screen can be repeatedly screened. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a graded recovery device and method for aluminum ash slag, thereby solving the technical problem that aluminum ash slag is prone to accumulate under inertia in the angle between the lower end of the screen and the side wall of the box, making it impossible to pass through the screen sufficiently.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A graded aluminum recovery device for aluminum ash slag, comprising:

[0007] The box body has a feeding hopper connected to its top, and several screen plates are slidably installed inside it. The screen plates are provided with inclined screens, and the size of the screen mesh decreases from high to low along the height of the screen plate. The two sides of the screen plates are connected to the side wall of the box body through folding plates.

[0008] A positioning plate, fixed to the outer wall of the box, and several sieve plates rotatably mounted on several positioning plates, wherein the positioning plates are provided with transmission components connected to the sieve plates; and

[0009] The drive wheel is mounted on the housing and is driven to rotate by a drive source. When the drive source drives the drive wheel to rotate, the drive wheel drives several screen plates to flip up and down through the transmission assembly.

[0010] As a further aspect of the present invention: an open collection box is fixed to one end of the positioning plate, the end of the sieve plate near the collection box is rotatably connected to the positioning plate through a hinge, and a magnetic block is provided on the folding plate above this end of the sieve plate, the magnetic block being magnetically attracted to a magnet fixed to the side wall of the box.

[0011] As a further aspect of the present invention: the transmission assembly includes:

[0012] An assembly box is fixed to the outer wall of the box body. A rotating shaft is rotatably installed inside the box body, and the rotating shaft is connected to the drive wheel via a belt. A first bevel gear is coaxially fixedly installed on the rotating shaft.

[0013] A driven wheel is rotatably mounted inside an assembly box, and a second bevel gear, meshing with a first bevel gear, is coaxially fixedly mounted on it. A push rod is fixed to the driven wheel, and a vertical rod is fixed to the sieve plate, the position of which interferes with the movement path of the push rod.

[0014] The bottoms of the plurality of sieve plates are respectively connected to the plurality of positioning plates via the plurality of reset components.

[0015] As a further aspect of the present invention: a roller is rotatably mounted on the end of the upright that contacts the push rod.

[0016] As a further aspect of the present invention: the movement paths of the uprights and push rods on the top screen plate interfere with each other, and adjacent screen plates are connected by a connecting rod.

[0017] As a further embodiment of the present invention: the drive wheel is coaxially rotatably connected to the feed hopper, and a through hole is provided at its axis. The through hole is located inside the discharge port of the feed hopper, and a plurality of circumferentially arranged partition blocks are provided inside the through hole. A dispersing cone plate is connected to the bottom of the drive wheel, and a plurality of circumferentially arranged partition rods are provided on the dispersing cone plate.

[0018] As a further aspect of the present invention: the dispersing cone plate is provided with a plurality of holes, and the diameter of the holes is smaller than the diameter of the screen on the top sieve plate.

[0019] A method for graded recovery of aluminum from aluminum ash slag, the method being applied to the aluminum grading and recovery device for aluminum ash slag as described above, the method comprising the following steps:

[0020] Step S1: Aluminum ash slag is fed into the box through the feed hopper. The aluminum ash slag falls onto the screen plate located at the top and rolls along the inclined screen plate.

[0021] Step S2: The aluminum ash slag passing through the top screen plate falls onto the next screen plate for further screening. The aluminum ash slag passes through several screen plates in sequence, achieving layer-by-layer screening until it is intercepted.

[0022] Step S3: The drive source drives the drive wheel to rotate. The drive wheel drives several screen plates to flip up and down through the transmission assembly, so that the aluminum ash slag on each screen plate rolls back and forth.

[0023] As a further aspect of the present invention, step S3 specifically includes the following steps:

[0024] Step S31: The drive source drives the driving wheel to rotate. The driving wheel drives the rotating shaft to rotate synchronously through the belt. Then the first bevel gear rotates and drives the second bevel gear to rotate, which makes the driven wheel rotate, and in turn makes the push rod rotate.

[0025] Step S32: When the push rod rotates to contact the upright, the driven wheel continues to rotate, and the push rod pushes the upright to descend, causing the top screen plate to flip downward. At this time, the folding plate above the top screen plate stretches, and the folding plate below it retracts.

[0026] Step S33: Several sieve plates are synchronously flipped downwards through connecting rods;

[0027] Step S34: After the push rod rotates away from the upright, the reset component drives the top screen plate to flip upward and reset. At the same time, several screen plates are connected by a connecting rod to flip upward synchronously. At this time, the folding plate above the top screen plate retracts and the folding plate below it stretches.

[0028] Step S35: Repeat steps S32 to S33, and the aluminum ash slag on each sieve plate will roll back and forth.

[0029] The beneficial effects of this invention are:

[0030] (1) In this invention, the drive source drives the drive wheel to rotate, and the drive wheel drives several screen plates to flip up and down through the transmission component. The aluminum ash slag on each screen plate rolls back and forth, which can prevent the aluminum ash slag from accumulating in the angle between the lower end of the screen plate and the side wall of the box. This ensures that the aluminum ash slag on each screen plate can roll back and forth, thereby realizing the repeated screening of aluminum ash slag on each screen plate. This ensures that the aluminum ash slag can fully contact the screen, avoids the formation of slag piles, and prevents some ash slag smaller than the screen size from passing through the screen plate, thereby improving the multi-stage recovery effect of aluminum in aluminum ash slag.

[0031] (2) In this invention, after screening, the magnetic block and the magnet are separated, and the folded plate with the magnetic block installed is pressed down. The aluminum ash slag on the screen plate can pass through the magnetic block and the magnet and fall into the collection box to achieve graded recycling.

[0032] (3) In this invention, when the feed is fed through the feed hopper, the drive source drives the drive wheel to rotate, and several partition blocks rotate synchronously, which can break up the aluminum ash slag. The broken aluminum ash slag falls onto the dispersion cone plate and falls along several partition rods, which can further disperse the aluminum ash slag and ensure that the aluminum ash slag can fully contact the screen plate. The setting of the holes can realize pre-screening. The aluminum ash slag that meets the hole diameter falls onto the screen plate first after passing through the hole, and the remaining aluminum ash slag falls onto the screen plate later. In this way, the aluminum ash slag can be fed in batches and sequentially, thereby ensuring that the aluminum ash slag is fully screened. Attached Figure Description

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the sieve plate in this invention;

[0036] Figure 3 This is a schematic diagram of the positioning plate in this invention;

[0037] Figure 4 This is a schematic diagram of the transmission component in this invention;

[0038] Figure 5 This is a schematic diagram of the structure of the rotating shaft in this invention;

[0039] Figure 6 This is a schematic diagram of the structure of the separator block in this invention;

[0040] Figure 7 This is a schematic diagram of the dispersion cone plate in this invention.

[0041] In the diagram: 1. Box body; 2. Feed hopper; 3. Screen plate; 4. Positioning plate; 5. Drive wheel; 6. Transmission assembly; 601. Assembly box; 602. Rotating shaft; 603. Belt; 604. Driven wheel; 605. First bevel gear; 606. Second bevel gear; 607. Push rod; 608. Vertical rod; 609. Roller; 610. Reset component; 611. Connecting rod; 7. Hinge component; 8. Folding plate; 9. Magnet; 10. Magnetic block; 11. Collection box; 12. Through hole; 13. Separator block; 14. Dispersing cone plate; 15. Partition rod; 16. Hole. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1-3 As shown, the present invention is a graded recovery device for aluminum in aluminum ash slag, comprising:

[0044] The box body 1 has a feed hopper 2 connected to its top, and several screen plates 3 are slidably installed inside it. The screen plates 3 are provided with inclined screens, and the size of the screen mesh decreases from high to low along the height of the screen plate 3. The two sides of the screen plate 3 are connected to the side wall of the box body 1 through folding plates 8.

[0045] Positioning plates 4 are fixed to the outer wall of the housing 1, and several sieve plates 3 are rotatably mounted on several positioning plates 4. Each positioning plate 4 is equipped with a transmission assembly 6 connected to the sieve plates 3.

[0046] The drive wheel 5 is mounted on the housing 1 and is driven to rotate by a drive source. When the drive source drives the drive wheel 5 to rotate, the drive wheel 5 drives several screen plates 3 to flip up and down through the transmission assembly 6.

[0047] In one embodiment, the driving source can be a motor assembly, a gear assembly or a pulley assembly driven by a motor, as long as it can make the drive wheel 5 rotate. This embodiment does not make any specific limitations.

[0048] In practical application, aluminum ash slag is fed into the box 1 through the feed hopper 2. The aluminum ash slag falls onto the top screen plate 3 and rolls along the inclined screen plate 3. The aluminum ash slag that passes through the top screen plate 3 falls onto the next screen plate 3 for further screening. The aluminum ash slag passes through several screen plates 3 in sequence, achieving layer-by-layer screening until it is intercepted. During this process, the drive source drives the drive wheel 5 to rotate. The drive wheel 5 drives several screen plates 3 to flip up and down through the transmission component 6. The aluminum ash slag on each screen plate 3 rolls back and forth, which can prevent the aluminum ash slag from accumulating in the angle between the lower end of the screen plate 3 and the side wall of the box 1. This ensures that the aluminum ash slag on each layer of screen plate 3 can roll back and forth, thereby achieving repeated screening of aluminum ash slag on each layer of screen. This ensures that the aluminum ash slag can fully contact the screen and avoid the formation of slag piles, which would prevent some ash slag smaller than the screen size from passing through the screen plate 3. This improves the multi-stage recovery effect of aluminum in aluminum ash slag.

[0049] like Figures 1-3As shown, in a preferred embodiment of the present invention, one end of the positioning plate 4 is fixed with an open collection box 11, the end of the sieve plate 3 near the collection box 11 is rotatably connected to the positioning plate 4 through a hinge 7, and a magnetic block 10 is provided on the folding plate 8 above this end of the sieve plate 3, the magnetic block 10 is magnetically attracted to the magnet 9 fixed on the side wall of the box body 1.

[0050] In one embodiment, the hinge 7 includes a fixed shaft fixed to the sieve plate 3 and a support column fixed to the positioning plate 4, and the fixed shaft and the support column are rotatably connected.

[0051] In practical application, in the initial state, the sieve plate 3 is inclined and its end near the collection box 11 is lower than its end away from the collection box 11. When the sieve plate 3 flips back and forth, the hinge 7 and the positioning plate 4 rotate relative to each other. After screening, the magnetic block 10 and the magnet 9 are separated, and the folding plate 8 with the magnetic block 10 installed is pressed down. The aluminum ash slag on the sieve plate 3 can pass through the magnetic block 10 and the magnet 9 and fall into the collection box 11 to achieve graded recycling.

[0052] like Figures 1-6 As shown, in a preferred embodiment of the present invention, the transmission assembly 6 includes:

[0053] Assembly box 601 is fixed to the outer wall of box body 1. A rotating shaft 602 is rotatably installed inside the box. The rotating shaft 602 is connected to the drive wheel 5 through belt 603. A first bevel gear 605 is coaxially fixedly installed on the rotating shaft 602.

[0054] Driven wheel 604 is rotatably mounted inside assembly box 601, and a second bevel gear 606, meshing with the first bevel gear 605, is coaxially fixedly mounted on it. A push rod 607 is fixed on driven wheel 604, and a vertical rod 608 is fixed on sieve plate 3, with the position of the vertical rod 608 interfering with the movement path of the push rod 607; and

[0055] The bottoms of the plurality of sieve plates 3 are respectively connected to the plurality of positioning plates 4 via the reset component 610.

[0056] In one embodiment, the reset member 610 may be selected as such Figure 2 The spring shown can be replaced by other components with a reset function, such as a spring sheet or an elastic telescopic rod, etc., which are not specifically limited in this embodiment.

[0057] In practical application, the drive source drives the active wheel 5 to rotate. The active wheel 5 drives the rotating shaft 602 to rotate synchronously via the belt 603. The first bevel gear 605 rotates and drives the second bevel gear 606 to rotate, causing the driven wheel 604 to rotate, which in turn causes the push rod 607 to rotate. When the push rod 607 rotates to contact the upright 608, the driven wheel 604 continues to rotate, and the push rod 607 pushes the upright 608 down, causing the top screen plate 3 to flip downward. At this time, the folding plate 8 above the top screen plate 3 stretches, and the folding plate 8 below it retracts. After the push rod 607 rotates away from the upright 608, the reset member 610 drives the top screen plate 3 to flip upward and reset. At this time, the folding plate 8 above the top screen plate 3 retracts, and the folding plate 8 below it stretches. This process is repeated to achieve the reciprocating flipping of the screen plate 3, ensuring that the aluminum ash slag on the screen plate 3 can roll back and forth, preventing its accumulation.

[0058] like Figure 2 As shown in Figure 6, in a preferred embodiment of the present invention, a roller 609 is rotatably mounted on the end of the upright 608 that contacts the push rod 607; in practical applications, when the push rod 607 pushes the upright 608 to flip downward, the roller 609 rotates, which can reduce the wear on the surface of the upright 608.

[0059] like Figures 2-6 As shown, in a preferred embodiment of the present invention, the movement paths of the upright rod 608 and the push rod 607 on the top screen plate 3 interfere with each other, and two adjacent screen plates 3 are connected by a connecting rod 611; in practical applications, when the top screen plate 3 is flipped, several screen plates 3 are flipped synchronously by the connecting rod 611.

[0060] like Figures 1-7 As shown, in a preferred embodiment of the present invention, the drive wheel 5 is coaxially rotatably connected to the feed hopper 2, and a through hole 12 is provided at its axis. The through hole 12 is located inside the discharge port of the feed hopper 2, and a plurality of circumferentially arranged partition blocks 13 are provided inside the through hole 12. A dispersing cone plate 14 is connected to the bottom of the drive wheel 5, and a plurality of circumferentially arranged partition rods 15 are provided on the dispersing cone plate 14.

[0061] In one embodiment, the dispersing cone plate 14 is provided with a plurality of holes 16, and the diameter of the holes 16 is smaller than the diameter of the screen on the top sieve plate 3.

[0062] In practical application, when the aluminum ash is fed through the feed hopper 2, the drive source drives the drive wheel 5 to rotate, and the several partition blocks 13 rotate synchronously, which can break up the aluminum ash. The broken aluminum ash falls onto the dispersing cone plate 14 and falls along several partition rods 15, which can further disperse the aluminum ash and ensure that the aluminum ash can fully contact the screen plate 3. The setting of the holes 16 can realize pre-screening. The aluminum ash that meets the diameter of the holes 16 falls onto the screen plate 3 first after passing through the holes 16, and the remaining aluminum ash falls onto the screen plate 3 subsequently. In this way, the aluminum ash can be fed in batches and sequentially, thereby ensuring that the aluminum ash is fully screened.

[0063] Please see Figures 1-7 As shown, this invention provides a method for the graded recovery of aluminum from aluminum ash slag. The method is applied to the aluminum graded recovery device for aluminum slag described in the above embodiments, and includes the following steps:

[0064] Step S1: Aluminum ash slag is fed into box 1 through feed hopper 2. The aluminum ash slag falls onto the screen plate 3 located at the top and rolls along the inclined screen plate 3.

[0065] Step S2: The aluminum ash slag passing through the top screen plate 3 falls onto the next screen plate 3 for further screening. The aluminum ash slag passes through several screen plates 3 in sequence to achieve layer-by-layer screening until it is intercepted.

[0066] Step S3: The drive source drives the drive wheel 5 to rotate. The drive wheel 5 drives several screen plates 3 to flip up and down through the transmission component 6, so that the aluminum ash slag on each screen plate 3 rolls back and forth.

[0067] like Figures 1-7 As shown, in a preferred embodiment of the present invention, step S3 specifically includes the following steps:

[0068] Step S31: The drive source drives the drive wheel 5 to rotate. The drive wheel 5 drives the rotating shaft 602 to rotate synchronously through the belt 603. Then the first bevel gear 605 rotates and drives the second bevel gear 606 to rotate, which makes the driven wheel 604 rotate, and then makes the push rod 607 rotate.

[0069] Step S32: When the push rod 607 rotates to contact the upright rod 608, the driven wheel 604 continues to rotate, and the push rod 607 pushes the upright rod 608 down, causing the top screen plate 3 to flip downward. At this time, the folding plate 8 above the top screen plate 3 stretches, and the folding plate 8 below it retracts.

[0070] Step S33: Several sieve plates 3 are synchronously flipped downwards through connecting rod 611;

[0071] Step S34: After the push rod 607 rotates away from the upright rod 608, the reset piece 610 drives the top screen plate 3 to flip upward and reset. At the same time, several screen plates 3 are synchronously flipped upward through the connecting rod 611. At this time, the folding plate 8 above the top screen plate 3 retracts and the folding plate 8 below it stretches.

[0072] Step S35: Repeat steps S32 to S33, and the aluminum ash on each sieve plate 3 will roll back and forth.

[0073] Working principle of the invention: The above embodiments of the invention provide a graded recovery device and method for aluminum in aluminum ash slag. The drive wheel 5 is driven to rotate by a drive source. The drive wheel 5 drives several screen plates 3 to flip up and down through the transmission component 6. The aluminum ash slag on each screen plate 3 rolls back and forth, which can prevent the aluminum ash slag from accumulating in the angle between the lower end of the screen plate 3 and the side wall of the box 1. This ensures that the aluminum ash slag on each layer of screen plate 3 can roll back and forth, thereby realizing repeated screening of aluminum ash slag on each layer of screen. This ensures that the aluminum ash slag can fully contact the screen and avoid the formation of slag piles, which would prevent some ash slag smaller than the screen size from passing through the screen plate 3. This improves the multi-stage recovery effect of aluminum in aluminum ash slag.

[0074] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A graded recovery device for aluminum from aluminum ash slag, characterized in that, include: The box (1) has a feeding hopper (2) connected to its top, and several screen plates (3) are slidably installed inside it. The screen plates (3) are provided with inclined screens, and the size of the screen holes decreases from high to low along the height of the screen plates (3). The two sides of the screen plates (3) are connected to the side walls of the box (1) through folding plates (8). Positioning plates (4) are fixed to the outer wall of the housing (1), and several sieve plates (3) are rotatably mounted on several positioning plates (4). A transmission assembly (6) connected to the sieve plates (3) is provided on the positioning plates (4); and The drive wheel (5) is mounted on the housing (1) and driven to rotate by the drive source. When the drive source drives the drive wheel (5) to rotate, the drive wheel (5) drives several screen plates (3) to flip up and down through the transmission assembly (6). One end of the positioning plate (4) is fixed with an open collection box (11). The end of the sieve plate (3) near the collection box (11) is rotatably connected to the positioning plate (4) through a hinge (7). A magnetic block (10) is provided on the folding plate (8) above this end of the sieve plate (3). The magnetic block (10) is magnetically attracted to the magnet (9) fixed on the side wall of the box body (1). The transmission assembly (6) includes: Assembly box (601) is fixed on the outer wall of box body (1). A rotating shaft (602) is rotatably installed inside it. The rotating shaft (602) is connected to the drive wheel (5) through belt (603). A first bevel gear (605) is coaxially fixed on the rotating shaft (602). Driven wheel (604), rotatably mounted inside assembly box (601), and coaxially fixedly mounted on it a second bevel gear (606) meshing with the first bevel gear (605); push rod (607) is fixed on driven wheel (604); and The bottom of several sieve plates (3) is connected to several positioning plates (4) by several reset components (610); The vertical rod (608) on the top screen plate (3) interferes with the movement path of the push rod (607), and two adjacent screen plates (3) are connected by a connecting rod (611); The drive wheel (5) is coaxially connected to the feed hopper (2), and a through hole (12) is provided at its axis. The through hole (12) is located inside the discharge port of the feed hopper (2), and a number of partition blocks (13) arranged in a circle are provided inside the through hole (12). A dispersing cone plate (14) is connected to the bottom of the drive wheel (5), and a number of partition rods (15) arranged in a circle are provided on the dispersing cone plate (14). The dispersing cone plate (14) is provided with several holes (16), and the diameter of the holes (16) is smaller than the diameter of the screen on the top sieve plate (3).

2. The graded recovery device for aluminum in aluminum ash slag according to claim 1, characterized in that, A roller (609) is rotatably mounted on the end of the upright (608) that contacts the push rod (607).

3. A method for graded recovery of aluminum from aluminum ash slag, characterized in that, The method is applied to the graded recovery device for aluminum in aluminum ash slag as described in any one of claims 1-2, and the method includes the following steps: Step S1: Aluminum ash slag is fed into the box (1) through the feed hopper (2). The aluminum ash slag falls onto the screen plate (3) located at the top and rolls along the inclined screen plate (3). Step S2: The aluminum ash slag that passes through the top screen plate (3) falls onto the next screen plate (3) for further screening. The aluminum ash slag passes through several screen plates (3) in sequence to achieve layer-by-layer screening until it is intercepted. Step S3: The drive source drives the drive wheel (5) to rotate. The drive wheel (5) drives several screen plates (3) to flip up and down through the transmission assembly (6), so the aluminum ash slag on each screen plate (3) rolls back and forth.

4. The method for graded recovery of aluminum from aluminum ash slag according to claim 3, characterized in that, Step S3 specifically includes the following steps: Step S31: The drive source drives the drive wheel (5) to rotate. The drive wheel (5) drives the shaft (602) to rotate synchronously through the belt (603). Then the first bevel gear (605) rotates and drives the second bevel gear (606) to rotate, so that the driven wheel (604) rotates, and then the push rod (607) rotates. Step S32: When the push rod (607) rotates to contact the upright rod (608), the driven wheel (604) continues to rotate, and the push rod (607) pushes the upright rod (608) down, causing the top screen plate (3) to flip downward. At this time, the folding plate (8) above the top screen plate (3) stretches, and the folding plate (8) below it retracts. Step S33: Several sieve plates (3) are synchronously flipped downwards through connecting rods (611); Step S34: After the push rod (607) rotates away from the upright (608), the reset piece (610) drives the top screen plate (3) to flip upward and reset. At the same time, several screen plates (3) are synchronously flipped upward through the connecting rod (611). At this time, the folding plate (8) above the top screen plate (3) retracts and the folding plate (8) below it stretches. Step S35: Repeat steps S32 to S33, and the aluminum ash on each sieve plate (3) will roll back and forth.

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